As title says really, got lil bottle fed lamb 2 1/2 wks of ages had since around 48hrs old, all was going well till couple days ago, he is currently in the position where he can't stand up on his own or stand for any length of time under 30 sec, if supporting him while standing he shakes while legs seem to buckle, he is still alert calling for milk while happily nibbling on hay/straw/pellets what ever is near he is also happily taking water. Though he is wee'ing I haven't seen any stools but could be falling to bottom on straw.
He has had pen/step, metacam & vitesel. He also had some long lasting anti bots when 4 days old for snotty/crusty nose, not sure if this could be related.
Any ideas welcome.